Kerber joins major US Open casualties list

Angelique Kerber has joined the list of US Open favourites to be bundled out of the tournament while Maria Sharapova advanced.

Wimbledon champion Kerber was another single-digit seed eliminated in the first week after 3-6 6-3 6-3 defeat to Dominika Cibulkova - leaving none of this year's Grand Slam winners left in the women's draw.

Only one of the top-four seeds on the women's side remain in the last 32 - defending champion and third-seeded Sloane Stephens.

"I was not able actually to play my best tennis in the important moment," Kerber said.